Infrared study of the adsorption of methanol on oxidised and reduced Cu/SiO2 catalysts
Millar, Graeme J., Rochester, Colin H., & Waugh, Kenneth C. (1991) Infrared study of the adsorption of methanol on oxidised and reduced Cu/SiO2 catalysts. Journal of the Chemical Society, Faraday Transactions, 87(17), pp. 2795-2804.
Infrared spectra are reported of methanol adsorbed at 295 K on reduced Cu/SiO2 and on Cu/SiO2 which had been preoxidised by exposure to excess nitrous oxide. Methanol was chemisorbed on reduced Cu/SiO2 to give methoxy species on both silica and copper, gave a trace of formate on copper via reaction with residual surface oxygen, and was weakly adsorbed at SiOH sites on the silica support. Heating the adsorbed species at 393 K led to the loss of methoxy groups on copper and the concomitant formation of a bidentate surface formate. Heating reduced Cu/SiO2 in methanol at 538 K initially gave both gaseous and adsorbed (on Cu) methyl formate which subsequently decomposed to CO and hydrogen. The reactions of methanol with oxidised Cu/SiO2 were similar to those for the reduced catalyst although surface oxygen promoted the formation of surface methoxy groups on copper. Subsequent heating at 393 K led first to unidentate formate before the appearance of bidentate formate.
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|Item Type:||Journal Article|
|Keywords:||copper, catalyst, methanol, infrared|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Catalysis and Mechanisms of Reactions (030601)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 1991 Royal Society of Chemistry|
|Copyright Statement:||Restrictions on further re-use and further distribution|
|Deposited On:||21 Aug 2013 23:38|
|Last Modified:||21 Aug 2013 23:54|
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